package com.itheima.config;

import com.itheima.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进入静态资源映射");
       registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");


    }

    /*
    * 扩展MVC的消息转换器
    * */
    protected void extendMessage(List<HttpMessageConverter<?>>converters){
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverterr = new MappingJackson2HttpMessageConverter();
        //设置对象转换器。底层使用Jackson将java转换为json
        messageConverterr.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到MVC框架的转换器集合中
        converters.add(0,messageConverterr);
        super.extendMessageConverters(converters);


    }
}
